DLPA052A November   2014  – August 2025 DLP9000 , DLP9000X , DLP9500 , DLPC900 , DLPC910

 

  1.   1
  2.   System Design Considerations Using TI DLP Technology down to 400 nm
  3.   Trademarks
  4. 1Introduction
  5. 2Thermal Considerations
  6. 3Duty Cycle Considerations
  7. 4Coherency Considerations
  8. 5Optical Considerations
  9. 6High De-magnification System Considerations
    1. 6.1 Incoherent Sources (Lamps and LEDs)
    2. 6.2 Coherent Sources (Lasers)
  10. 7Summary
  11. 8References
  12. 9Revision History

6 High De-magnification System Considerations

Consumer projection systems using DLP technology typically use an illumination design as shown in Figure 6-1.

Typical Projection System Optics Figure 6-1 Typical Projection System Optics

However, some lithography and 3D print systems can use de-magnification of the DMD array image to address very small features as small as 1µm. Figure 6-2 shows the small size of the output aperture of such systems relative to a traditional projection optical system.

Light Distribution at Projection Lens Entrance Pupil Figure 6-2 Light Distribution at Projection Lens Entrance Pupil

Considerations for these relatively small apertures are divided into two areas – incoherent sources and coherent sources.